I picked up Scarface, Spiked Tail, and (Kenner) Stalker yesterday, they're f**king fantastic and I'm blown away that these exist. The old Kenner Spiked Tail was the very first Predator toy I ever got, and the new NECA remake is totally amazing. I'd have picked up Clan Leader and Ghost if they'd had them, as well.
I need to exchange my Stalker today, though - the one I bought has two right feet, and his right hand doesn't stay pegged in properly. He still looks super cool, though.
I know I've asked this but I don't think I've seen it answered, what exactly is the Ghost Predator an homage to? I can't figure out what Kenner figure it's referencing.